The page responds successfully and no noindex directive, redirect or canonical to another URL was found. It does not mean a search engine has indexed it.
Not eligible
A blocker was found: an error response, a redirect, or a noindex directive. A canonical pointing elsewhere is counted here too, but it is only a hint.
Could not assess
A timeout, blocked fetch, unfinished JavaScript rendering or conflicting canonicals meant the page could not be judged either way.
Error response
The page returns an HTTP error (4xx or 5xx), so there is nothing to index.
Canonical points elsewhere
A hint, not a blocker: the page names another URL as the preferred version, and search engines may or may not follow it.
Issues found
Errors and warnings, counted once per page and check.